Автор - ytapocheck

30 ^{2}  - 29 ^{2}  \ 57 {}^{2}  - 56 {}^{2}

Ответ

Автор - lapinvitya

Формула: a^2-b^2=(a-b)(a+b)

30^2-29^2=(30-29)(30+29)=1cdot 59=59

57^2-56^2=(57-56)(57+56)=1cdot 113=113

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